The Stern Gang was declared a terrorist organization when Israel was founded.
Between 5 December 1948 and 25 January 1949, Yellin-Mor and Shmuelevitz were tried in a military court on terrorism charges.[105] The prosecution accused them of the murder of Bernadotte, though they were not specifically charged with it.[105] Senior officers of the IDF, including Yisrael Galili and David Shaltiel, told the court that Lehi had hindered, rather than assisted the fight against the British and the Arabs.[105]
As to the Irgun, the literally had armed conflicts with the Haganah (it is likely that some Irgun members were even kidnapped and tortured by the Haganah between 1944 and 1945, read up on “The Saison”).
The Stern Gang was declared a terrorist organization when Israel was founded.
https://en.wikipedia.org/wiki/Lehi_(militant_group)#The_Lehi_trial_and_the_Fighters’_Party
As to the Irgun, the literally had armed conflicts with the Haganah (it is likely that some Irgun members were even kidnapped and tortured by the Haganah between 1944 and 1945, read up on “The Saison”).